[CMake] cmake 2.6-RC-8: Problem with WxWidgets 2.8 on OSX 10.3

David Cole david.cole at kitware.com
Wed Apr 16 11:38:32 EDT 2008 

I have committed a fix to CVS CMake that should avoid this problem in the
future. It should be included in the next CMake 2.6 RC.

$ cvs commit -m "BUG: There are compiler problems with wxWidgets and
INCLUDE_DIRECTORIES(SYSTEM ...) use on the Mac. Set variable
wxWidgets_INCLUDE_DIRS_NO_SYSTEM on the Mac in FindwxWidgets.cmake to avoid
these problems." FindwxWidgets.cmake
/cvsroot/CMake/CMake/Modules/FindwxWidgets.cmake,v  <--  FindwxWidgets.cmake
new revision: 1.19; previous revision: 1.18

As a workaround (for now, until the next CMake 2.6 RC, or possibly to get
past this problem with CMake 2.4.8, although I have not verified with 2.4.8)
you can do the following in your CMakeLists.txt file *before* including
UsewxWidgets.cmake:

SET(wxWidgets_INCLUDE_DIRS_NO_SYSTEM 1)


By the way, "-isystem" seems to work fine on the Mac for other directories
(besides the wxWidgets include directory). There is a CMake test named
"complex" that exercises the INCLUDE_DIRECTORIES(SYSTEM ...) functionality
and it passes on all our Mac dashboards.


HTH,
David


On Tue, Apr 15, 2008 at 5:10 PM, Honest Guvnor <honestguvnor at googlemail.com>
wrote:

> On Tue, Apr 15, 2008 at 6:47 PM, David Cole <david.cole at kitware.com>
> wrote:
> > Is there a sample CMake project that I could try to reproduce this with?
> Or
> > could you send me access to your source tree? Is it an open source
> project?
>
> Copy minimal.cpp (and sample.xpm) from wxWidgets samples directory with:
>
> CMakeLists.txt ------------------------------------------------------
>
> cmake_minimum_required(VERSION 2.6)
>
> project(FRED C CXX Fortran)
>
> set(CMAKE_VERBOSE_MAKEFILE TRUE)
>
> FIND_PACKAGE(wxWidgets COMPONENTS base core gl)
> if(wxWidgets_FOUND)
>    include(${wxWidgets_USE_FILE})
> else(wxWidgets_FOUND)
>    message("ERROR: wxWidgets not found!")
> endif(wxWidgets_FOUND)
>
> include_directories(${wxWidgets_INCLUDE_DIRS} )
>
> add_executable(fred minimal.cpp)
>
> SET_TARGET_PROPERTIES(fred
>        PROPERTIES
>        LINKER_LANGUAGE CXX)
>
> target_link_libraries(fred ${wxWidgets_LIBRARIES})
>
>
> =================================================================================================
> bolt:~/cmaketest andy$ cmake .; make
> -- The C compiler identification is GNU
> -- The CXX compiler identification is GNU
> -- The Fortran compiler identification is GNU
> -- Check for working C compiler: /usr/bin/gcc
> -- Check for working C compiler: /usr/bin/gcc -- works
> -- Detecting C compiler info
> -- Detecting C compiler info - done
> -- Check for working CXX compiler: /usr/bin/c++
> -- Check for working CXX compiler: /usr/bin/c++ -- works
> -- Detecting CXX compiler info
> -- Detecting CXX compiler info - done
> -- Check for working Fortran compiler: /usr/local/bin/gfortran
> -- Check for working Fortran compiler: /usr/local/bin/gfortran -- works
> -- Checking whether /usr/local/bin/gfortran supports Fortran 90
> -- Checking whether /usr/local/bin/gfortran supports Fortran 90 -- yes
> -- Found wxWidgets: TRUE
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /Users/andy/cmaketest
> /usr/local/bin/cmake -H/Users/andy/cmaketest -B/Users/andy/cmaketest
> --check-build-system CMakeFiles/Makefile.cmake 0
> /usr/local/bin/cmake -E cmake_progress_start
> /Users/andy/cmaketest/CMakeFiles
> /Users/andy/cmaketest/CMakeFiles/progress.make
> make -f CMakeFiles/Makefile2 all
> make -f CMakeFiles/fred.dir/build.make CMakeFiles/fred.dir/depend
> cd /Users/andy/cmaketest && /usr/local/bin/cmake -E cmake_depends
> "Unix Makefiles" /Users/andy/cmaketest /Users/andy/cmaketest
> /Users/andy/cmaketest /Users
> /andy/cmaketest
> /Users/andy/cmaketest/CMakeFiles/fred.dir/DependInfo.cmake --color=
> make -f CMakeFiles/fred.dir/build.make CMakeFiles/fred.dir/build
> /usr/local/bin/cmake -E cmake_progress_report
> /Users/andy/cmaketest/CMakeFiles 1
> [100%] Building CXX object CMakeFiles/fred.dir/minimal.cpp.o
> /usr/bin/c++   -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXMAC__
> -D__WXMAC__ -isystem
> /usr/local/lib/wx/include/mac-ansi-release-static-2.8 -isystem /usr/l
> ocal/include/wx-2.8   -o CMakeFiles/fred.dir/minimal.cpp.o -c
> /Users/andy/cmaketest/minimal.cpp
> In file included from /usr/local/include/wx-2.8/wx/wxprec.h:13,
>                 from /Users/andy/cmaketest/minimal.cpp:21:
> /usr/local/include/wx-2.8/wx/defs.h:609: error: template with C linkage
> In file included from /usr/local/include/wx-2.8/wx/memory.h:16,
>                 from /usr/local/include/wx-2.8/wx/object.h:20,
>                 from /usr/local/include/wx-2.8/wx/wx.h:16,
>                  from /Users/andy/cmaketest/minimal.cpp:30:
> /usr/local/include/wx-2.8/wx/string.h:994: error: declaration of C
> function `
>   wxString operator+(const wxString&, char)' conflicts with
> /usr/local/include/wx-2.8/wx/string.h:992: error: previous declaration `
>   wxString operator+(const wxString&, const wxString&)' here
> /usr/local/include/wx-2.8/wx/string.h:996: error: declaration of C
> function `
>   wxString operator+(char, const wxString&)' conflicts with
> ...
>
>
> =================================================================================================
> In Darwin.cmake change this:
>
> # Xcode does not support -isystem yet.
> IF(XCODE)
>  SET(CMAKE_INCLUDE_SYSTEM_FLAG_C)
>  SET(CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
> ENDIF(XCODE)
>
> to this:
>
> # Xcode does not support -isystem yet.
> ###IF(XCODE)
>  SET(CMAKE_INCLUDE_SYSTEM_FLAG_C)
>  SET(CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
> ###ENDIF(XCODE)
>
> To give:
>
>
> =================================================================================================
> bolt:~/cmaketest andy$ make clean; rm CMakeCache.txt; cmake .; make
> make -f CMakeFiles/Makefile2 clean
> make -f CMakeFiles/fred.dir/build.make CMakeFiles/fred.dir/clean
> /usr/local/bin/cmake -P CMakeFiles/fred.dir/cmake_clean.cmake
> -- The C compiler identification is GNU
> -- The CXX compiler identification is GNU
> -- The Fortran compiler identification is GNU
> -- Check for working C compiler: /usr/bin/gcc
> -- Check for working C compiler: /usr/bin/gcc -- works
> -- Detecting C compiler info
> -- Detecting C compiler info - done
> -- Check for working CXX compiler: /usr/bin/c++
> -- Check for working CXX compiler: /usr/bin/c++ -- works
> -- Detecting CXX compiler info
> -- Detecting CXX compiler info - done
> -- Check for working Fortran compiler: /usr/local/bin/gfortran
> -- Check for working Fortran compiler: /usr/local/bin/gfortran -- works
> -- Checking whether /usr/local/bin/gfortran supports Fortran 90
> -- Checking whether /usr/local/bin/gfortran supports Fortran 90 -- yes
> -- Found wxWidgets: TRUE
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /Users/andy/cmaketest
> /usr/local/bin/cmake -H/Users/andy/cmaketest -B/Users/andy/cmaketest
> --check-build-system CMakeFiles/Makefile.cmake 0
> /usr/local/bin/cmake -E cmake_progress_start
> /Users/andy/cmaketest/CMakeFiles
> /Users/andy/cmaketest/CMakeFiles/progress.make
> make -f CMakeFiles/Makefile2 all
> make -f CMakeFiles/fred.dir/build.make CMakeFiles/fred.dir/depend
> cd /Users/andy/cmaketest && /usr/local/bin/cmake -E cmake_depends
> "Unix Makefiles" /Users/andy/cmaketest /Users/andy/cmaketest
> /Users/andy/cmaketest
>  /Users/andy/cmaketest
> /Users/andy/cmaketest/CMakeFiles/fred.dir/DependInfo.cmake --color=
> make -f CMakeFiles/fred.dir/build.make CMakeFiles/fred.dir/build
> /usr/local/bin/cmake -E cmake_progress_report
> /Users/andy/cmaketest/CMakeFiles 1
> [100%] Building CXX object CMakeFiles/fred.dir/minimal.cpp.o
> /usr/bin/c++   -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXMAC__
> -D__WXMAC__ -I/usr/local/lib/wx/include/mac-ansi-release-static-2.8
> -I/usr/local/in
> clude/wx-2.8   -o CMakeFiles/fred.dir/minimal.cpp.o -c
> /Users/andy/cmaketest/minimal.cpp
> Linking CXX executable fred
> /usr/local/bin/cmake -E cmake_link_script CMakeFiles/fred.dir/link.txt
> --verbose=1
> /usr/bin/c++   -D__WXMAC__ -Wl,-search_paths_first
> -headerpad_max_install_names -fPIC CMakeFiles/fred.dir/minimal.cpp.o
> -o fred  -L/usr/local/lib -
> L/usr/local/lib -framework QuickTime -framework IOKit -framework
> Carbon -framework Cocoa -framework System
> /usr/local/lib/libwx_base_carbon-2.8.a /u
> sr/local/lib/libwx_mac_core-2.8.a /usr/local/lib/libwx_mac_gl-2.8.a
> -lwxexpat-2.8 -lwxtiff-2.8 -lwxjpeg-2.8 -lwxpng-2.8 -lz -lpthread
> -liconv -frame
> work WebKit -framework OpenGL -framework AGL
> /usr/local/bin/cmake -E cmake_progress_report
> /Users/andy/cmaketest/CMakeFiles  1
> [100%] Built target fred
> /usr/local/bin/cmake -E cmake_progress_start
> /Users/andy/cmaketest/CMakeFiles 0
> bolt:~/cmaketest andy$
>
> The isystem flag is recognised by gcc but whatever it is supposed to
> do does not seem to work. Someone has disabled it for xcode but left
> it in for those outside xcode. Perhaps it works in versions after OSX
> 10.3. Perhaps the environment is nonstandard and broken on this
> computer but I do not have easy access to another Mac at the moment.
>
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